The paper introduced the freezing shafting sinking method,full face shaft drilling method,grouting method and other special shaft sinking methods generally for the mine shaft construction in water bearing and unstable alluvium and water bearing bedrock.

A new technology of perforation depth correction for special well.

For testing of HP-HT and special well,a reasonable down hole testing string and tech design for guaranteeing success of testing operation is needed and reliable surface equipment, safety emergency shut off system and surface monitor system should be prepared.

In recent years,logging database has been established in oilfields,but the special logging data are preserved in the form of "pictures",so it brings a lot of inconvenience for the latter use.